International St. Mary & Milk Rivers Study Board to hold webinar March 26


The International St. Mary & Milk Rivers Study Board is hosting a public webinar on March 26, 2024. All are welcome to attend.

The purpose of the webinar is to provide an update on the study's progress, activities, timeline and workplan, with an emphasis on the technical work that is ongoing. Attendees may pose questions to the study board at a designated portion of the webinar. 

The webinar will begin at 7:00 PM MDT. Click here to register through

This webinar will build upon the information provided by the ISMMRSB during its 2022 public webinar (recording available at the IJC’s Vimeo page). Participants are encouraged to visit the ISMMRSB website for additional information, including the Study Workplan, progress reports, and factsheets.

The International St. Mary and Milk Rivers Study began in 2021 and is exploring options to improve access to the apportioned waters of the rivers in both countries. This is in recognition of the challenges that have emerged in apportioning the waters of the two rivers, since the IJC issued its initial Order more than 100 years ago in 1921 and the potential effects of climate change going forward.

The St. Mary and Milk Rivers are connected through the St. Mary Canal, which moves water from the more sustainable flow of the St. Mary River to the naturally ephemeral Milk River. These waters are split, or apportioned, between Canada and the United States under the provisions in the 1909 Boundary Waters Treaty and in the IJC’s 1921 Order. The water flow is measured at the border and the amount available to users in each country is calculated according to the guidelines used by the federally appointed Accredited Officers. 

Helpful Links:


Paul Allen   Canadian Section                         (613) 222-1475

Ed Virden   US Section                            (202) 372-7990

General inquiries: